Perhaps you should try some spelling variations:
phan chong » phan cong, phan hong, phan chung
phap chong » phap phong, phap cong, pham hong
canh thoi » cach thoi, hanh thoi, anh tho
van canh » van anh, van hanh, van manh
thoi tap » toi tap, hoc tap, thoi dai
cuu toan » cuu hoan, cua toan, huu toan
nhan tai » hang tai, van tai, toan tai
va nhan » van nhan, ca nhan, va phan
do xa » doi xa, do va, o xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: van canh thoi tap, nghien cuu toan khoa ((phan chong) OR (phap chong)) do xa hoi va nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "van canh thoi tap, nghien cuu toan khoa ((phan chong) OR (phap chong)) do xa hoi va nhan tai".
• Adding a wildcard symbol may retrieve word variants: van canh thoi tap, nghien cuu toan khoa ((phan chong) OR (phap chong)) do xa hoi va nhan tai*.